Installation Manual

ManualsBrandsAirQuest ManualsCentral Air & Heating3 Ton 16 SEER Two Stage Heat Pump

428 01 5600 00 July/2017

INSTALLATION INSTRUCTIONS

R- 410A 2- Stage Split System Heat Pump

N4H6 (2 - 5 Tons)

SAFETY CONSIDERATIONS

NOTE: Read the entire instruction manual before starting the

installation.

Improper installation, adjustment, alteration, service, maintenance,

or use can cause explosion, fire, electrical shock, or other

conditions which may cause death, personal injury, or property

damage. Consult a qualified installer, service agency, or your

distributor or branch for information or assistance. The qualified

installer or agency must use factory- authorized kits or accessories

when modifying this product. Refer to the individual instructions

packaged with the kits or accessories when installing.

Follow all safety codes. Wear safety glasses, protective clothing,

and work gloves. Use quenching cloth for brazing operations.

Have fire extinguisher available. Read these instructions

thoroughly and follow all warnings or cautions included in

literature and attached to the unit. Consult local building codes and

current editions of the National Electrical Code (NEC) NFPA 70.

In Canada, refer to current editions of the Canadian electrical code

CSA 22.1.

Recognize safety information. This is the safety- alert symbol

When you see this symbol on the unit and in instructions or

manuals, be alert to the potential for personal injury. Understand

these signal words; DANGER, WARNING, and CAUTION. These

words are used with the safety- alert symbol. DANGER identifies

the most serious hazards which will result in severe personal injury

or death. WARNING signifies hazards which could result in

personal injury or death. CAUTION is used to identify unsafe

practices which would result in minor personal injury or product

and property damage. NOTE is used to highlight suggestions

which will result in enhanced installation, reliability, or operation.

WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal

injury or death.

Before installing, modifying, or servicing system, main

electrical disconnect switch must be in the OFF position.

There may be more than 1 disconnect switch. Lock out and

tag switch with a suitable warning label.

EXPLOSION HAZARD

Failure to follow this warning could

result in death, serious personal injury,

and/or property damage.

Never use air or gases containing

oxygen for leak testing or operating

refrigerant compressors. Pressurized

mixtures of air or gases containing

oxygen can lead to an explosion.

WARNING

INSTALLATION RECOMMENDATIONS

NOTE: In some cases noise in the living area has been traced to

gas pulsations from improper installation of equipment.

1. Locate unit away from windows, patios, decks, etc. where

unit operation sound may disturb customer.

2. Ensure that vapor and liquid tube diameters are appropriate

for unit capacity.

3. Run refrigerant tubes as directly as possible by avoiding un-

necessary turns and bends.

4. Leave some slack between structure and unit to absorb vi-

bration.

5. When passing refrigerant tubes through the wall, seal open-

ing with RTV or other pliable silicon- based caulk. (See Fig.

1.)

6. Avoid direct tubing contact with water pipes, duct work,

floor joists, wall studs, floors, and walls.

7. Do not suspend refrigerant tubing from joists and studs with

a rigid wire or strap which comes in direct contact with

tubing.(See Fig. 1.)

8. Ensure that tubing insulation is pliable and completely sur-

rounds vapor tube.

9. When necessary, use hanger straps which are 1 in. (25.4

mm) wide and conform to shape of tubing insulation. (See

Fig. 1.)

10. Isolate hanger straps from insulation by using metal sleeves

bent to conform to shape of insulation.

INSULATION

SUCTION TUBE

LIQUID TUBE

OUTDOOR WALL INDOOR WALL

LIQUID TUBE

SUCTION TUBE

INSULATION

CAULK

HANGER STRAP

(AROUND SUCTION

TUBE ONLY)

JOIST

1” (25.4 mm)

MIN

THROUGH THE WALL

SUSPENSION

A94026

Fig. 1 - Piping Installation

When outdoor unit is connected to factory- approved indoor unit,

outdoor unit contains system refrigerant charge for operation with

AHRI rated indoor unit when connected by 15 ft. (4.57 m) of

field- supplied or factory accessory tubing. For proper unit

operation, check refrigerant charge using charging information

located on control box cover and/or in the Check Charge section of

this instruction.

IMPORTANT: Maximum liquid- line size is 3/8- in. OD for all

residential applications including line line.

IMPORTANT: Always install the factory- supplied liquid- line

filter drier. Obtain replacement filter driers from your distributor or

branch.

Summary of content (10 pages)

PAGE 1
INSTALLATION INSTRUCTIONS R- 410A 2- Stage Split System Heat Pump N4H6 (2 - 5 Tons) SAFETY CONSIDERATIONS INSTALLATION RECOMMENDATIONS NOTE: Read the entire instruction manual before starting the installation. Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock, or other conditions which may cause death, personal injury, or property damage.
PAGE 2
INSTALLATION 3/8- in. (9.53 mm) Dia. Tiedown Knockouts in Basepan(2) Places CAUTION ! CUT HAZARD Failure to follow this caution may result in personal injury. Sheet metal parts may have sharp edges or burrs. Use care and wear appropriate protective clothing and gloves when handling parts.
PAGE 3
Table 1 – Accessory Usage Accessory Compressor Start Assist Capacitor and Relay Crankcase Heater Evaporator Freeze Thermostat Hard Shutoff TXV Isolation Relay Required for Low Ambient Cooling Applications (Below 55° F / 12.
PAGE 4
Brazing Connections WARNING ! FIRE HAZARD Failure to following this warning could result in personal injury, death and/or property damage. Refrigerant and oil mixture could ignite and burn as it escapes and contacts brazing torch. Make sure the refrigerant charge is properly removed from both the high and low sides of the system before brazing any component or lines. Connect vapor tube to fitting on outdoor unit vapor service valves (see Table 2).
PAGE 5
Final Tubing Check IMPORTANT: Check to be certain factory tubing on both indoor and outdoor unit has not shifted during shipment. Ensure tubes are not rubbing against each other or any sheet metal. Pay close attention to feeder tubes, makings sure wire ties on feeder tubes are secure and tight. Be sure field wiring complies with local and national fire, safety, and electrical codes, and voltage to system is within limits shown on unit rating plate.
PAGE 6
Thermidistat Fan Coil O O RVS Cooling O/B W2 W1 W2 Heat Stage 3 W/W1 W2 Heat/Cool Stage 1 Y1 / W2 Y1 Y Heat/Cool Stage 2 Y/Y2 Y/Y2 Fan G G 24VAC Hot Heating Rh R 24VAC Hot Cooling Rc Dry Contact 1 D1 Dry Contact 2 D2 DH 24VAC Common C C Humidify HUM Outdoor Air Temp OAT Remote Room Sensor RRS OAT/RRS Com SRTN Thermidistat Heat Pump Furnace Heat Pump O RVS Cooling O/B W2 W2 Heat Stage 3 (furnace) W/W1 W/W1 Heat/Cool Stage 1 Y1 / W2 Y1 Y Y2 Heat/Cool Sta
PAGE 7
Airflow Selection for FVM4 Fan Coils (non- communicating) The FVM4 provides high- and low- stage blower operation to match the capacities of the compressor at high- and low- stage. To select recommended airflow, refer to the FVM4 Installation Instructions. The FVM4 utilizes a control board that allows the installing technician to select proper airflows. This fan coil has an adjustable blower- off delay factory set at 90 sec. for high- and low- stage blower operation.
PAGE 8
The compressor will always start unloaded and stay unloaded for five seconds even when the thermostat is calling for high stage capacity. Quiet Shift- 2 Quiet shift- 2 is a field selectable defrost mode (factory set to OFF), which will reduce the occasional noise that could be heard at the start of defrost cycle and restarting of heating cycle. It is selected by placing DIP switch 3 on defrost board in the ON position.
PAGE 9
Unloader Test Procedure TROUBLESHOOTING The unloader is the compressor internal mechanism, controlled by the DC solenoid, that modulates between high and low stage. If it is suspected that the unloader is not working, the following methods may be used to verify operation. 1. Operate the system and measure compressor amperage. Cycle the unloader on and off at 30 second plus intervals at the thermostat (from low to high stage and back to low stage).
PAGE 10
R- 410A QUICK REFERENCE GUIDE S R- 410A refrigerant operates at 50- 70 percent higher pressures than R- 22. Be sure that servicing equipment and replacement components are designed to operate with R- 410A. S R- 410A refrigerant cylinders are rose colored. S Recovery cylinder service pressure rating must be 400 psig, DOT 4BA400 or DOT BW400. S R- 410A systems should be charged with liquid refrigerant.